And the vast majority will continue to come from only there (via some of the stronger youth academies) because there's virtually nowhere else for promising young players to go if they want to play professionally. That's not a good thing.

No. There is enough money domestically to make it happen, but unless there are some major changes the MLS will be considered a lesser league both domestically and abroad.

USSF doesn't seem to have a solid plan to advance football in the USA, and as long as that remains the MLS will stay a fringe league. It will make its money because it is in the USA, but talent wise it will never successfully compete and Team USA will continue to be held back for it (unless they fully compete to sending big talents overseas).